mcdermott



2 Sheets- -Sheet 1.

J. W. MGDERMOTT. BOLT READING MACHINE.

No. 52.433. Patented Feb. 6, 1866.

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J. w. McDERMOTT. BOLT'HEADING MACHINE.

Patented Feb. 6, 1866.

WW #1 W UNITED STATES PATENT OFFICE.

JOHN WM. MGDERMOTT, OF NEW YORK, N. Y.

BOLT-HEADING MACHINE.

Specification forming part of Letters'Patent No- 52,433, dated February6, 1866.

To all whom it may concern:

Be it known that I, J OHN WM. MCDERMOTT, of New York, in the county ofNew York and State of New York, have invented certain chine for headingbolts speedily and accurately;

and it consists, principally, of. two wheels and an accompanying systemof cams and gearing, the one wheel being furnished with aseries ofradial arms into the ends of which the unheaded bolts are inserted, andthe other wheel being furnished with a series of radial diescorresponding with the radial arms of the first wheel. Bythe action ofthe necessary cams and gearing each arm of the one wheel with itsunheaded bolt is brought into linear contact with the corresponding diesof the other wheel, and the head of the bolt is then formed. The die isthen withdrawn from the head of the bolt by the action of a set of jawsoperated by cams, and the headed bolt is finally expelled from the armin which it had been placed by the action of a lever, the action of thewhole being hereinafter more fully described.

Figure 1 is a top or plan view of the machine. Figv2 is a side view ofthe same. Fig. 3 is a vertical longitudinal central section of the same.Fig. 4 is a section of two opposite arms through the line w m, Fig.2,showing the lever for expelling the headed bolts and the manner inwhich it is operated. Fig. 5 is a section through the line 3/ y, Fig. 1,showing the ratchet-wheel and pawl for communicating rotary motion tothe wheels which carry the-arms and dies.

A is the driving-wheel by which motion is communicated to the machine'either directly or through the intervention of any wellknown system ofgearing.

B is the driving-wheel shaft which passes through the slide whichcarries the wheels 0 and the dies D. The shaftB, after passing throughthe bearings E and F in the frame G of the machine, is bent at rightangles, so

as to form a crank, S, working in the slot H in the sliding frame I ofthe die-wheel 0, so

that by the revolution of the said drivingwheel shaft B an alternatebackward and forward motion is given to the .-s 1 iding frame I anddie-wheel O. The die-wheel G is hung and revolves upon the centralpartof the slidin g frame I, which is supported by and slides backward andforward upon the guides J.

The die-whepl G is made to revolve at the proper time and through theproper space by means of the cogs .K, on the sides of said wheel O,nearits circumference,which cogs K; mesh into a small bevel-pinion, L, whichslides upon and revolves with'the shaft M. The bevel-pinion L is made toslide backward and forward uponthe shaft M, in connection with thebackward and forward movement of the frame I and die-wheel O, by meansof a part, N, of said frame I, which projects into a groove, 0, in saidpinion L, as represented in Fig. 2.

The bevel-pinion L'is kept from revolving upon and made to revolve withthe shaft M by means of a projection, P, extending so far along theshaft M as the. bevel-pinion L passes in its forward and-backwardmovements, said projection fittin g into a groove or channel in saidbevel-pinion L.

To the end of the driving-wheel shaft, op: posite to the driving-wheelA, is attached a crank, Q, which, by means of the connectingrod R, givesa backward and forward motion to the cranks, which crank S workslooselyupon the shaft of the wheel T, which carries the radial arms U, forreceiving the unheaded bolts. I 2

The crank S may be made broad, as represented in Figs. 1 and 5, so thatthe lower part of said crank maybe divided, so as to allow aratchet-wheel, V, to be attached to the shaft W of the wheel T, within arecess formed by cutting away the middle of the lower part of said crankS. To the upper part of said recess is attached a pawl, A',which catchesinto the teeth of said ratchet-wheel V, or said I ratchet-wheel and pawlmay be attached to the side of said crank S; but I prefer the mannerfirst described, as giving afirmer support to the pawl and a more promptmovement to the wheel T.

When the crank S moves in a direction to ward the die-wheel G the pawl Atakes hold of one ofthe teeth of the ratchet-wheel V andturns it. Totheside of the wheel Tv is atchine.

tached a system of cogs, B, meshing into a small bevel-pinion, (3,firmly secured 'to the shaft M. The shaft M works in bearings attachedto the side of the frame G of the ina- Thns by the action of the pawl Amotion is communicated to the wheel T, which, in turn, by means of thecogs B and bevelpinion 0, gives motion to the shaft M, and that, inturn, by means of the bevel-pinion L and cogs K, gives motion to thedie-wheel 0.

It will be observed that the wheel T and the die-wheel C revolvesimultaneously, butiu opposite directions, for while the wheel Trevolves from right to left the wheel 0 revolves from left to right.

The dies D are made in two pieces. The main piece D has a longitudinalopening through it, the upper part of which is of the precise form ofthe intended heads of the bolts, while the lower part of said opening isenlarged, as seen in Fig. 3. It is also made with an an nularprojection, U, as represented in the drawings, the object of which ishereinafter stated. The smaller piece 01 fits into the lower end of saidenlarged opening in the form of a cap, said piece or cap at having anopening through it for the passage of the pin or stop D. The pin or stopD is screwed into the die-wheel. C, or may be securedby a jamnut, is ofsuch a length as to extend through the die, so that its end may be flushwith the face of the die D when said die is close to the die-wheel G;and it is also of sufficient length to allow of its being screwed intothe die wheel 0 far enough to be strong and firm. Said pin or stop isalso furnished with an annular projection, e, fittinginto-the enlargedopening in the die D to prevent said die from dropping from the pin orstop D during the revolution of the die-wheel O.

holders E, the blocks F and G, the spring.

pusher H, and the lever I. The bolt-holders E fit over the ends of thearms U in the form of a cap, have an opening throughout their en'- tirelength large enough to receive the bolts intended to be operated upon,and extend nearly to the bottom of the main chamber of the arms U. Theblock F fits into the bottom of the main chamber of the arms U restsupon the circular shoulder there formed, as shown in Fig. 3, and leavesa space between the upper face of said block F and the foot of thebolt-holderE. The block G is placed in a small chamber extending downfrom the bottom of the main chamber of the arms U, as represented inFig. 3. Said block G rests upon one arm of the lever 1, against which itis held by the action of the spring-pusher H, which presses against anannular projection, f, on said block G. The lever 1 extends from thebottom of the lower chamber in the arms U, through an opening to theoutside of the wheel T, as represented in Fig. 4. The inner arm of saidlever I is held down against the bottom of the opening in which it worksby the spring-pusher H, acting upon the block G until the outer arm ofthe lever I is operated upon in themanner hereinafter described. Thesaid lever I is pivoted to the wheel T, near the outer surface of theside of said wheel, as

represented in Fig. 4. The lever I is operated by a cam-like projection,J, attached to the side of the frame G of the machine, against which theprojecting outer arms of the levers 1 impinge as the wheel T revolves.

To the end of the driving-wheel shaft B, projecting beyond thedriving-wheel A, is'attached a small crank, K, which, by means of aconnecting-rod, L, gives a backward and forward motion to the crank M,attached to the shaft N. i

To the shaft N are attached two cams, 0, each of which operates one ofthe jaws, P, closing them, as represented in Fig. 1, when one of thearms, U, of the wheel T and one of the dies, D, of the die-wheel 0 comeinto line with each other, and opening them as the arm and die pass awayfrom each other. Said jaws P close directly over the pointwhere theendsof the arm U and die D come into contact, act as guides in keeping themexactlyin the proper position,and at the'same time securely supportingthem while the pressure which forms the heads of the bolts is beingapplied. Said jaws P, when opening, push against the annular projectionU upon the die D, and force the die D off from the formed head of thebolt by shoving the die back-upon the pin or stop D, thus allowing thearm U and die D to revolve away from each other. Said jaws P- arepivoted to the frame G of the machine at the point T, as represented inFig. 1'. i

'To one of the jaws I 'isatt-ached a spring, R, which, as thedic D andarm Uare coming into line with each other, takes hold of theannularprojection U of the die D- and moves said the forward on the pin or stopD, so that the said die may receive the unheaded end of the boltbeforethe pressure which forms the heads of said bolts is applied by theforward movement of said die-wheel G, as hereinbefore described.

It is not necessary that there should be the same number of dies uponthe die-wheel O that there are arms upon the wheel T; but the gearingmust be so arranged that when one of the arms U comes into a horizontalposition one of the dies D shall come into the same poshallow than theformer one, first, because the I receptacle for the headed bolts whenexpelled from the bolt holders must be placed between the two troughs,and the sides of the latter trough must not rise so high as to interferewith the passage of said bolts from said bolt There 1 holders to saidreceptacle; and second, be-

cause less heat will be developed in the bolt-v holders than in thedies, and consequently a less depth of water will suflice to cool them.

Operation The machine being in the position represented in Fig. 1, annnheaded bolt with the end heated for heading isplaced in thebolt-holder which is next above the horizontal one, and the machine isstarted. The first effect is to open the jaws P, which forces the dieDfrom the-formed head. of the bolt, and then the die-wheelO slides backby the action of the crank S of the shaft B. The

pawl A now acts upon the ratchet-wheel V and causes the wheels T and Oto revolve. This brings another arm and die into a horizontal position,the jaws P now close, the spring R shoves the die forward upon the pinor stop I) to receive the unheaded end of the bolt, the crank S causesthe die-wheel O to slide forward and form the head ofthe b.olt,.

the jaws again open, force back the die from the head of the bolt, andso on continuously. At the same time that an arm and die come intoposition forforming the head of the bolt the revolntion of the wheel Tbri-ngsthe outer end of the lever I of the preceding arm U into contactwith the cam-like projection J", which operates the lever and expels thebolt into the receptacle prepared for it.

vtQi'ihewheels C and T.

3. The combination of the lever'I with the cam-like projection J and thewheel T, for the purpose of expelling the headed bolts from thebolt-holders E, substantiallyas described.

4. The combination of the spring R with the jaws P and the dies D,substantially as described, and for the purpose set forth.

5. The combination of the jaws P or their equivalent with the .dies Dandbolt-holders E, for thepurpose of centering the heads of the bolts,substantially as described.

6. The combination of the sliding frame I,

the die-wheel (J, and the crank S, formed on the shaft 13 of thedriving-wheel A, as set forth.

. JOHN WM. McDERMOTT. Witnesses: I

THos. P. How, JAMES T. GRAHAM.

